SBC PCD2.M5 Series - A Annex; Definitions of Serial Interfaces

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Denitionsofserialinterfaces
Annex
A-2
A
A.2 Denitionsofserialinterfaces
A.2.1 RS-232
Designation of signal lines:
Data lines
TXD Transmit data
RXD Receive data
Signal and
response circuits
RTS Request to send
CTS Clear to send
DTR Data terminal ready
DSR Data set ready
RI Ring indicator
DCD Data carrier detect
Signals to RS-232
Signal type Logical state Set-point Nominal value
Data signal 0(space)
1(mark)
+3 V to +15 V
-15 V to -3 V
+7 V
-7 V
Control/message
signal
0(off)
1(on)
-15 V to -3 V
+3 V to +15 V
-7 V
+7 V
The idle state of the data signals = "mark"
   ofthecontrolandmessagesignals=“off”